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2017 | Vol. 17, iss. 1 | 79--82
Tytuł artykułu

Studies on the Gases Emission under High Temperature Condition from Moulding Sands Bonded by Modified Starch CMS-Na

Treść / Zawartość
Warianty tytułu
Języki publikacji
EN
Abstrakty
EN
Emission of gases under high temperature after pouring molten metal into moulds, which contain the organic binder or other additives (solvents or curing agent), may be an important factor influencing both on the quality of the produced castings, and on the state of environment. Therefore, a comprehensive studies of the emitted gases would allow to determine restrictions on the use of the moulding sands in foundry technologies, eg. the probability of occurrence of casting defects, and identify the gaseous pollutants emitted to the environment. The aim of the research presented in this paper was to determine the amount of gases that are released at high temperatures from moulding sands bonded by biopolymer binder and the quantitative assessment of the emitted pollutants with particular emphasis on chemical compounds: benzene, toluene, ethylbenzene and xylenes (BTEX). The water-soluble modified potato starch as a sodium carboxymethyl starch with low (CMS-NaL) or high (CMS-NaH) degree of substitution was a binder in the tested moulding sands. A tests of gases emission level were conducted according to the procedure developed at the Faculty of Foundry Engineering (AGH University of Science and Technology) involving gas chromatography method (GC). The obtained results of the determination of amount of BTEX compounds generated during the decomposition process of starch binders showed lower emission of aromatic hydrocarbons in comparison with binder based on resin Kaltharz U404 with the acidic curing agent commonly used in the foundries.
Wydawca

Rocznik
Strony
79--82
Opis fizyczny
Bibliogr. 12 poz., tab., wykr.
Twórcy
  • AGH University of Science and Technology, Faculty of Foundry Engineering, Reymonta 23, 30-059 Kraków, Poland
  • AGH University of Science and Technology, Faculty of Foundry Engineering, Reymonta 23, 30-059 Kraków, Poland
  • AGH University of Science and Technology, Faculty of Foundry Engineering, Reymonta 23, 30-059 Kraków, Poland
Bibliografia
  • [1] Atanda, P.O., Akinlosotu, O.C. & Oluwole, O.O. (2014). Effect of Some Polysaccharide Starch Extracts on Binding Characteristics of Foundry Moulding Sand. International Journal of Scientific & Engineering Research. 5(3), 362-367.
  • [2] Beňo, J., Jelínek, P., Špirutová, N. & Mikšovský, F. (2011).
  • Efficiency of additives of the polysaccharide type on physical properties of bentonite mixtures. Archives of Foundry Engineering. 11(1), 5-8.
  • [3] Zhou, X., Yang, J. & Qu, G. (2007). Study on synthesis and properties of modified starch binder for foundry. Journal of Materials Processing Technology. 183(2-3), 407-411. DOI:10.1016/j.jmatprotec.2006.11.001.
  • [4] Grabowska, B., Sitarz, M., Olejnik, E., Kaczmarska, K. & Tyliszczak, B. (2015). FT-IR and FT-Raman studies of cross-linking processes with Ca2+ ions, glutaraldehyde and microwave radiation for polymer composition of poly(acrylic acid)/sodium salt of carboxymethyl starch - In moulding sands, Part I. Spectrochimica Acta - Part A: Molecular and Biomolecular Spectroscopy. 135, 529-535. DOI: 10.1016/j.saa.2015.06.084.
  • [5] Grabowska, B., Sitarz, M., Olejnik, E., Kaczmarska, K. & Tyliszczak, B. (2015). FT-IR and FT-Raman studies of cross-linking processes with Ca2+ ions, glutaraldehyde and microwave radiation for polymer composition of poly(acrylic acid)/sodium salt of carboxymethyl starch - In moulding sands, Part II. Spectrochimica Acta - Part A: Molecular and Biomolecular Spectroscopy. 151, 27-33. DOI: 10.1016/j.saa.2015.06.084.
  • [6] Kaczmarska, K., Grabowska, B., Drożyński, D., Bobrowski, A., Kurleto, Ż. & Szymański, Ł. (2016). Modified polysaccharides as alternative binders for foundry industry. Metalurija. 55(4), 839-842.
  • [7] Barrios, S.E., Contreras, J.M., López-Carrasquero, F. & Müller A.I. (2012). Chemical modification of cassava starch by carboxymethylation reactions using sodium monochloro acetate as modifying agent. Revista de la Facultad de Ingenieria U.C.V. 27(2), 97-105.
  • [8] Li, H.P., Zhang, S.S., Jiang, H., Li, B. & Li, X. (2011). Effect of degree of substitution of carboxymethyl starch on diaspore depression in reverse flotation. Transactions of Nonferrous Metals Society of China (English Edition). 21(8), 1868-1873. DOI:10.1016/S1003-6326(11)60943-6.
  • [9] Holtzer, M., Dańko, J., Lewandowski, J.L., Solarski, W., Dańko R. Grabowska, B. Bobrowski, A., Żymankowska-Kumon, S., Sroczyński, A., Różycki, A. & Skrzyński M. (2012). Patent Application No. P.398709. (in Polish).
  • [10] Kubecki, M., Holtzer, M. & Żymankowska S. (2013). Investigations of the Temperature Influence on Formation of Compounds from the BTEX Group During the Thermal Decomposition of Furan Resin. Archives of Foundry Engineering. 13(2), 85-90.
  • [11] Dańko, R. (2012). Strength model of self-setting moulding sands with synthetic resins in an aspect of the integrated matrix recycling process. Gliwice: Archives of Foundry Engineering. (in Polish).
  • [12] Jakab, E. (2015). Analytical Techniques as a Tool to Understand the Reaction Mechanism. In M. S. & R. K. S. A. Pandey, T. Bhaskar (Ed.), Recent Advances in Thermo-chemical Conversion of Biomass. Elsevier Ltd. DOI:http://dx.doi.org/10.1016/B978-0-444-63289-0.00003-X.
Uwagi
PL
Opracowanie ze środków MNiSW w ramach umowy 812/P-DUN/2016 na działalność upowszechniającą naukę (zadania 2017).
Typ dokumentu
Bibliografia
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